CVE-2020-9847: Apple Mac OS X

High severity, CVSS 8.6. EPSS: 0.7% chance of exploitation in the next 30 days.

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Catalina 10.15.5. A malicious application may be able to break out of its sandbox.

Affected products

• Apple Mac OS X: before 10.15.5 (fixed in 10.15.5)

Published 2020-06-09. Last modified 2026-06-17.